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Price of a Stamp. The current price of a first class stamp is 49 cents. A domestic first class letter (1 oz.) is 49 cents. The price of each additional ounce is 21 cents. It will cost you 34 cents to send a domestic postcard. Postage Rate Timeline.
Find what the current price of a stamp is and how much it costs to send letters. Your letter must be 1 ounce or under for this price. If your letter weighs more than 1 ounce, then it will cost more. The table below shows the prices for letters over 1 ounce (round up the weight, e.g. if it is 2.1 ounces, use 3 ounce price).